My Inquiry
My Account
Analog Devices Inc. LT8602EUJ#TRPBF
- Part No.:
- LT8602EUJ#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LT8602EUJ#TRPBF.pdf
- Description:
- IC REG BUCK ADJ QUAD 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,203
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8602EUJ#TRPBF from Analog Devices is a quad-channel monolithic synchronous step-down regulator with two 3V–42V high-voltage channels (1.5A and 2.5A) and two 2.6V–5.5V low-voltage channels (1.8A each), programmable 250kHz–2.2MHz switching frequency, 30µA quiescent current in Burst Mode®, and integrated power-on reset with adjustable delay via CPOR capacitor. It powers multi-rail systems in automotive infotainment and industrial PLCs.
For engineers reviewing the LT8602EUJ#TRPBF datasheet, LT8602EUJ#TRPBF pinout, LT8602EUJ#TRPBF application, or LT8602EUJ#TRPBF equivalent, key selection criteria include per-channel input voltage ranges (HV vs LV), independent PVIN pin assignment, 2-phase clocking for reduced input ripple, open-drain PG outputs with 8% regulation window, and BIAS-assisted INTVCC efficiency optimization.
Technical Context
The LT8602EUJ#TRPBF implements four independent current-mode buck regulators synchronized to a single oscillator with 180° phase shift between Channel 1/3 and Channel 2/4. High-voltage channels use internal 1V feedback reference with TRKSS-adjustable tracking; low-voltage channels use fixed 800mV reference and RUN-controlled soft-start.
Each channel features cycle-by-cycle current limiting, reverse-current protection, and dedicated power-good comparators. The device supports micropower Burst Mode® operation (30µA IQ) and pulse-skipping mode, with EN/UVLO threshold at 1.2V (±50mV hysteresis) and programmable POR via CPOR capacitor (31–39.4ms delay).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range (HV) | 3V to 42V on PVIN1/PVIN2 - enables direct battery-fed operation in 12V/24V/36V automotive and industrial systems |
| Input Voltage Range (LV) | 2.6V to 5.5V on PVIN3/PVIN4 - allows cascaded supply from HV outputs (e.g., 5V→1.8V/1.2V rails) |
| Output Current (Ch1/Ch2) | 1.5A / 2.5A - supports core logic and I/O rails with thermal derating up to 125°C junction |
| Output Current (Ch3/Ch4) | 1.8A each - delivers sufficient current for DDR memory termination and FPGA auxiliary supplies |
| Quiescent Current | 30µA with all channels active - sustains ultra-low-power standby in always-on vehicle modules |
| Switching Frequency | 250kHz to 2.2MHz - RT-resistor programmable; avoids AM band interference and enables compact magnetics |
| Feedback Reference | 1.0V (Ch1/Ch2), 0.8V (Ch3/Ch4) - defines output setpoint accuracy and resistor-divider design constraints |
Pinout & Package
LT8602EUJ#TRPBF is housed in a thermally enhanced 40-lead 6mm × 6mm QFN package (UJ) with exposed pad (Pin 41) soldered to PCB ground for optimal thermal performance (θJC = 2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN1, PVIN2 | HV Input Supply Pins | Independent 3V–42V inputs for Ch1/Ch2; require local low-ESR bypass to adjacent GND pins |
| PVIN3, PVIN4 | LV Input Supply Pins | 2.6V–5.5V inputs for Ch3/Ch4; typically connected to HV outputs; UVLO threshold 2.35V |
| FB1–FB4 | Feedback Inputs | Regulate to 1.0V (Ch1/Ch2) or 0.8V (Ch3/Ch4); open-loop stability depends on external compensation network |
| PG1–PG4 | Power-Good Indicators | Open-drain outputs pulled low when FBx deviates >8% from reference; valid only after INTVCC ≥2.7V |
| SW1–SW4 | Switch Nodes | High-frequency switching nodes connecting to external inductors; layout critical for EMI and efficiency |
| RT | Oscillator Frequency Control | Resistor-to-ground sets switching frequency (250kHz–2.2MHz); tolerance directly impacts fSW accuracy |
| CPOR, POREN | Power-On Reset Timing | CPOR capacitor sets POR delay (31–39.4ms); POREN enables/disables timer with weak internal pull-up |
| BIAS | INTVCC Regulator Input | Connect to ≥3.1V supply to reduce VIN quiescent current; improves light-load efficiency |
| EN/UVLO | Enable & Input UVLO | 1.2V threshold with 50mV hysteresis; enables shutdown (<1µA) or programmable input undervoltage lockout |
| RST | POR Output | Open-drain CMOS output held low until POR completes; used to hold downstream logic in reset |
Key Features
| Feature | Design Value |
|---|---|
| 2-Phase Clock Architecture | Channels 1+3 and 2+4 operate 180° out-of-phase, halving peak input ripple current and reducing required input capacitance |
| Burst Mode® Operation | 30µA total quiescent current across all four regulators at 12VIN, enabling >10-year battery life in always-on applications |
| Independent PVIN Pins | Four isolated input pins allow mixed-supply architectures (e.g., PVIN1=24V, PVIN2=12V, PVIN3=5V, PVIN4=3.3V) without cross-regulation |
| Programmable Power-On Reset | Adjustable POR delay (31–39.4ms) via external CPOR capacitor ensures reliable system boot sequencing |
| Per-Channel RUN Inputs | RUN3/RUN4 enable independent soft-start control and power sequencing for LV outputs, supporting complex rail-ordering requirements |
Applications
| Automotive Infotainment | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Powering SoC, display interface, audio codec, and CAN transceiver from 12V battery with strict EMI limits. IC Role / Device Role / Timing Role: Quad-buck regulator providing 5V (SoC I/O), 3.3V (CAN PHY), 1.8V (DDR), and 1.2V (core) with 2-phase clocking to meet CISPR25 Class 5 radiated emission limits. Use Value: Single-chip solution eliminates discrete DC/DCs, reduces board area by 40%, and achieves <15mV output ripple in Burst Mode® at light load. | Use Scenario: Generating isolated 24V→5V/3.3V/1.8V/1.2V rails for microcontroller, analog front-end, digital isolators, and fieldbus PHYs. IC Role / Device Role / Timing Role: Centralized multi-rail PMIC delivering sequenced, monitored, and protected outputs with PG signaling to FPGA configuration logic. Use Value: Independent RUN3/RUN4 and per-channel PG outputs enable deterministic power-up timing and fault isolation without external supervisors. |
| Medical Diagnostic Imaging | Test & Measurement Equipment |
Use Scenario: Supplying low-noise analog sensor bias, FPGA core, ADC/DAC reference, and communication interface in portable ultrasound units. IC Role / Device Role / Timing Role: Four tightly regulated outputs with 800mV/1.0V references and 30µA quiescent current to extend battery runtime during standby. Use Value: BIAS pin connection to 5V rail cuts VIN IQ by 40%, extending battery life while maintaining fast wake-up response. | Use Scenario: Providing precision 5V, 3.3V, 1.8V, and 1.2V rails for high-speed ADCs, RF synthesizers, and FPGA fabric in benchtop analyzers. IC Role / Device Role / Timing Role: Synchronized 2MHz switching across all channels minimizes beat frequencies and simplifies EMI filter design. Use Value: 2.2MHz max fSW enables use of 1.0µH inductors, reducing component height and improving thermal profile in dense layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8603EUJ#TRPBF | Same pinout and package; adds spread-spectrum modulation and improved EMI performance; identical electrical specs except RST pin is push-pull instead of open-drain | Preferred for CISPR25 Class 5 compliance-critical automotive designs where radiated emissions must be minimized without external filters | Select LT8603EUJ#TRPBF when EMI filtering headroom is insufficient and spread-spectrum operation is acceptable for system timing jitter |
| MPQ4482GL-AEC1-Z | Quad-channel buck with 3.8V–36V input; lower max output current (1.2A/1.5A/1.2A/1.2A); no programmable POR or BIAS pin; AEC-Q100 Grade 1 qualified | Suitable for cost-sensitive automotive body electronics where full 42V capability and advanced sequencing are not required | Choose MPQ4482GL-AEC1-Z for entry-level automotive applications needing AEC-Q100 qualification but not 42V tolerance or multi-phase ripple reduction |
Compared with LT8603EUJ#TRPBF, the LT8602EUJ#TRPBF lacks spread-spectrum modulation but offers open-drain RST for flexible reset assertion; versus MPQ4482GL-AEC1-Z, it delivers higher current, wider input range, and superior light-load efficiency-critical for premium infotainment and industrial control systems.
Availability
LT8602EUJ#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and medical diagnostic imaging equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for LT8602EUJ#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8602EUJ#TRPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency monolithic DC/DC regulators, engineered for demanding multi-rail power systems where input voltage range, light-load efficiency, and EMI performance are critical.
FAQ
What is the maximum input voltage rating for the high-voltage channels of the LT8602EUJ#TRPBF?
The LT8602EUJ#TRPBF high-voltage channels (Ch1 and Ch2) have an absolute maximum input voltage rating of 42V on PVIN1 and PVIN2. The recommended operating range is 3V to 42V. Exceeding 42V may cause permanent damage, as specified in the Absolute Maximum Ratings table. This 42V rating enables direct connection to 24V and 36V industrial buses and 12V automotive systems with load-dump margin.
How does the LT8602EUJ#TRPBF achieve 30µA quiescent current with all four channels active?
The LT8602EUJ#TRPBF achieves 30µA total quiescent current in Burst Mode® by dynamically disabling internal circuitry-including gate drivers, error amplifiers, and oscillator-between switching cycles while maintaining regulation via stored energy in output capacitors. This behavior is confirmed in the Typical Application section and Electrical Characteristics table under "VIN Quiescent Current, Operating" with all channels enabled per the front-page schematic.
Can the LT8602EUJ#TRPBF generate different output voltages simultaneously, and what are the supported ranges?
Yes, the LT8602EUJ#TRPBF supports four independent output voltages: Ch1 (5V), Ch2 (3.3V), Ch3 (1.8V), and Ch4 (1.2V) as shown in the Typical Application diagram. Output voltage is set via external resistor dividers using 1.0V reference (Ch1/Ch2) or 0.8V reference (Ch3/Ch4). The device supports any combination within its current and input voltage constraints-for example, 12V→3.3V/2.5V/1.1V/0.9V-using standard 1% feedback resistors.
What is the function of the BIAS pin on the LT8602EUJ#TRPBF, and how does it affect efficiency?
The BIAS pin on the LT8602EUJ#TRPBF supplies the internal INTVCC regulator. When connected to a ≥3.1V external supply (e.g., Ch1's 5V output), it reduces VIN quiescent current and improves light-load efficiency by offloading INTVCC generation from the main input. Leaving BIAS unconnected results in higher VIN IQ and reduced efficiency below 100mA load, as documented in the Pin Functions and Applications Information sections.
Does the LT8602EUJ#TRPBF support synchronization to an external clock, and what are the voltage requirements?
Yes, the LT8602EUJ#TRPBF supports external clock synchronization via the SYNC pin, which accepts TTL/CMOS-compatible signals from 0.25MHz to 2.2MHz. SYNC low enables low-ripple Burst Mode®; SYNC high enables pulse-skipping mode. The pin requires logic-low ≤0.3V and logic-high ≥1.2V, with input current ±100nA. Floating SYNC is prohibited and must be tied to GND or VDD.
LT8602EUJ#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 2.6V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V, 1V
- Voltage - Output (Max):
- 42V
- Current - Output:
- 1.5A, 1.8A, 2.5A
- Frequency - Switching:
- 250kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
LT8602EUJ#TRPBF FAQ
1.How can I place an order for LT8602EUJ#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8602EUJ#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT8602EUJ#TRPBF reliable?
The price and inventory of LT8602EUJ#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8602EUJ#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8602EUJ#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8602EUJ#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8602EUJ#TRPBF?
LT8602EUJ#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8602EUJ#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT8602EUJ#TRPBF?
For technical support, including LT8602EUJ#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8602EUJ#TRPBF requirements.
6.How does Aetrix verify that LT8602EUJ#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8602EUJ#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT8602EUJ#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8602EUJ#TRPBF?
All LT8602EUJ#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8602EUJ#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT8602EUJ#TRPBF part is unused and in its original packaging.
Return procedure for LT8602EUJ#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8602EUJ#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
